7. Rubyの数値 # $age = 49; age = 49 # $price = 10000; price = 10_000 # => 10000 # M_PI Math::PI # => 3.141592653589793 8. Rubyの整数 2 ** 1024 # => 1797693134862315907729305 1907890247336179769789423065727343008115 7732675805500963132708477322407536021120 1138798713933576587897688144166224928474 3063947412437776789342486548527630221960 1246094119453082952085005768838150682342 462881473913110540827237163